How To Force 3G? - One (M8) Q&A, Help & Troubleshooting

I've tried *#*#4636#*#* but the code doesn't work. As soon as I type that, my phone dialer just goes blank. So how do I force 3G?

Do you mean basically shut off LTE (force only use of 3G and GSM/2G/EDGE)? Since GSM is the often used fall-back from 3G, and it's not currently a great idea to only have 3G. At least not until carrier start shutting down the GSM networks (which is coming soon, from what I understand).
If that is what you mean, if you go into Settings>Mobile data, do you have the Preferred network type, with the option to force GSM and 3G? Or does it just change back, if you do have this option shown?
What carrier version of the M8 do you have? The network type is locked out (to always allow all three: GSM, 3G and LTE) on the US carrier versions. And this also affects the dialer codes to force the network mode.

redpoint73 said:
Do you mean basically shut off LTE (force only use of 3G and GSM/2G/EDGE)? Since GSM is the often used fall-back from 3G, and it's not currently a great idea to only have 3G. At least not until carrier start shutting down the GSM networks (which is coming soon, from what I understand).
If that is what you mean, if you go into Settings>Mobile data, do you have the Preferred network type, with the option to force GSM and 3G? Or does it just change back, if you do have this option shown?
What carrier version of the M8 do you have? The network type is locked out (to always allow all three: GSM, 3G and LTE) on the US carrier versions. And this also affects the dialer codes to force the network mode.
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Nah, nothing to do with 4G but my network keeps switching back and forth (3G/2G). I've noticed that this causes some battery drain
The code has worked previously with other ROMs but not quite so on Verizon 6.0. I wouldn't mind locking to 2G either since I don't use data

Related

[Q] help!3G connectivity has gone from my phone

my phone can not connect to 3G networks in most of our city, while it used to work just fine in these same places. at first i thought there must be something wrong with the carrier's base stations. but today i tested my SIM card on another LU6200(Korean version of Nitro HD) and it works perfectly both on 3G and 2g networks on that phone. but when i put it back into my phone, it can only get 2G signal. if i set the Preferred Network Type to WCDMA ONLY, it got no signal with just a cross on the signal bar. i have to put it back into GSM ONLY mode to receive signal.if i go out, i can get partial 3G connectivity here and there, but not consistently. sometimes even if i have full 3G bar signals on the status bar, i can not make calls or connect to the internet.i've got this problem probably after i tried to forcibly go into the Phone Info menu.i got repetitive " the process com.android.phone has stopped unexpectedly" promps , and i just ignored it and tried again. now ,2 options are missing from the menu, LTE/WCDMA/GSM and LTE Global.in place of them, it's UNKNOWN. i already tried flashing KDZ package of no avail. Does this mean a hardware malfucntion or software glitch?Please help!Thank you in advance
No one can answer?
freefall12 said:
No one can answer?
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Ask att store for a different sim card i had lte issues and new sim card helped try that
LG NITRO-N XDA APP
Well you do HAVE GSM only selected. THATS 2G(EDGE)
for 3G you would need to select WCDMA
hyelton said:
Well you do HAVE GSM only selected. THATS 2G(EDGE)
for 3G you would need to select WCDMA
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^^^So true
LG NITRO-N XDA APP
no, if i select wcdma, i got no signal.it should be hardware problem

[Q] How to Keep LTE and HSPA while Disabling 2G/Edge?

How to keep LTE and HSPA while disabling GSM/2G/Edge?
I keep randomly getting the "No Service" problem with Telus, and I'm assuming it's a very similar problem with the original S1.
I know you can set it to HSPA mode only, but I'm assuming this means no LTE.
I've gone to the phone codes > debug mode, but there's no option for LTE and HSPA... (not unexpected)
PatcheZ said:
How to keep LTE and HSPA while disabling GSM/2G/Edge?
I keep randomly getting the "No Service" problem with Telus, and I'm assuming it's a very similar problem with the original S1.
I know you can set it to HSPA mode only, but I'm assuming this means no LTE.
I've gone to the phone codes > debug mode, but there's no option for LTE and HSPA... (not unexpected)
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Settings>Wireless and Networks, Select "More...">MobileNetwork>NetworkMode>HSPA/LTE. This will ensure you connect to LTE while in LTE capable zones. You can also stay on only HSPA to save battery. Cheers.
DarthDerron said:
Settings>Wireless and Networks, Select "More...">MobileNetwork>NetworkMode>HSPA/LTE. This will ensure you connect to LTE while in LTE capable zones. You can also stay on only HSPA to save battery. Cheers.
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Thanks, but that isn't an option.
There is no HSPA/LTE option, only GSM/HSPA/LTE (auto). I want to lock it out from ever getting to GSM (2G).
And no, I do not want to stay in HSPA mode, or I might as well have bought an international galaxy s3

Phone stays on HSPA when LTE is available

So I own a D851, currently on T-Mobile with good LTE speeds in my area but quite often the phone switches to HSPA and doesn't utilize LTE coverage when I need it. I end up having to either switch data off/on or accessing the radio settings menu and setting it to LTE ONLY. I understand the slower network coverage saves battery but to just stay there I don't get when I'm getting download speeds of 9mb on HSPA and 30mb on LTE in the exact same spot. The thing that sucks about setting the radio to LTE ONLY is that I can't browse while on a call. Anyone know a workaround?
xlxcrossing said:
So I own a D851, currently on T-Mobile with good LTE speeds in my area but quite often the phone switches to HSPA and doesn't utilize LTE coverage when I need it. I end up having to either switch data off/on or accessing the radio settings menu and setting it to LTE ONLY. I understand the slower network coverage saves battery but to just stay there I don't get when I'm getting download speeds of 9mb on HSPA and 30mb on LTE in the exact same spot. The thing that sucks about setting the radio to LTE ONLY is that I can't browse while on a call. Anyone know a workaround?
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I had the same issue with ATT, unlocked phone. Made sure the APN was correct, tried may other APN settings, and finally called Consumer Cellular. They advised I did, indeed, have the correct APN (my first version). They did some type of reset on their end, and viola.
On my OnePlus it was the similar. APN was correct, same APN as the G3, but until I called CC, and their reset, phone would not show LTE at all, only H and H+
apn settings?
JeffDC said:
I had the same issue with ATT, unlocked phone. Made sure the APN was correct, tried may other APN settings, and finally called Consumer Cellular. They advised I did, indeed, have the correct APN (my first version). They did some type of reset on their end, and viola.
On my OnePlus it was the similar. APN was correct, same APN as the G3, but until I called CC, and their reset, phone would not show LTE at all, only H and H+
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What are the apn settings that are working for you? I've tried several times to address this issue with CC but lte STILL isnt working on either of our 2 devices. Had no problems when used with an att account.
I am still having this same problem on my LG G3 (vs985) on Cricket Wireless

g3 d850 unlocked cannot detect 3g, hsdpa or 4g lte.

hello! i have g3 d850 at&t and its unlocked but i have problems while i try to connect phone with 3g or 4g lte data, signal bar ddisappears when i force connect with wcdma or lte. gsm work well. apn is ok. o g2 i have 3g 4g lte ok, with same apn and same parameters but on g3 i can connect only with 2g or E. please help me!
Same happen to me
Kind of the same happens to me(I'm in Claro - Argentina provider) and also D855
Signal bars go when i select WCDMA only but when i go LTE/WCDMA/GSM, i do get 3G+ but after a while (dont know if its when the device goes to sleep or idk, but after 30+- minutes) the modem stop responding, i can't make calls, get them or get any data.
I havent been able to find why this happens (tried different versions modem) and roms.... any help would also be apreciated.
I get it sometimes too and for me the solution is changing the APN. Sometimes carriers have different apns like "vodafone live" and "vodafone internet". So be sure you choose the right apn settings.
ogzhnpcmn said:
I get it sometimes too and for me the solution is changing the APN. Sometimes carriers have different apns like "vodafone live" and "vodafone internet". So be sure you choose the right apn settings.
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I tried it, didn't work either! After some time, the modem stop responding... dont get internet or the ability to get or make phone calls.

Verizon SIM Data working

So i have an activated Verizon SIM that I was able to get semi-working on my OnePlus 3. Only data is working though. Calls and text don't seem to work.
I can only get service if I select "LTE" as my Preferred Network Type. I've tried multiple other combinations of GSM, LTE, CDMA, and WCDMA, and TD-SCDMA and none of them worked. Only "LTE".
I know this phone doesn't have the CDMA radio, but I feel like I should be able to get 3G or H+ on Verizon. Any suggestions on other Preferred Network Types to try? There's a ton of options, I've only had luck with LTE (and as I said, that was data only).
Is there a way to tell if I'm using a different antenna for the Verizon SIM? My main carrier is T-Mobile.
Bsanborn said:
So i have an activated Verizon SIM that I was able to get semi-working on my OnePlus 3. Only data is working though. Calls and text don't seem to work.
I can only get service if I select "LTE" as my Preferred Network Type. I've tried multiple other combinations of GSM, LTE, CDMA, and WCDMA, and TD-SCDMA and none of them worked. Only "LTE".
I know this phone doesn't have the CDMA radio, but I feel like I should be able to get 3G or H+ on Verizon. Any suggestions on other Preferred Network Types to try? There's a ton of options, I've only had luck with LTE (and as I said, that was data only).
Is there a way to tell if I'm using a different antenna for the Verizon SIM? My main carrier is T-Mobile.
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I was a VZW user when I got the OP3 and I struggles with trying all the APN options even calling VZW to set some custom APN but nothing worked well. I never got LTE on 3g at best but point of ever having data and voice at the same time was no hope. With the frustration and VZW seeming to never ready go GSM I just moved over to ATT. I also have a TMobile account but only for house not my cell line.

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